Device for distributing air



Sept. 9 1933- J. SASSENBERG 1,926,794

DEVICE FOR DISTRIBUTING AIR Filed NOV. 25, 1932 X472 en Patented Sept.12, 1933 UNITED STATES 1,926,194 DEVICE FOR DISTRIBUTING ma 1 JostSassenberg, Cologne, Germany, assignor to Franz J. Kurth,Cologne-Dellbruck, Germany Application November 23,

1932, Serial No.

643,959, and in Germany November 28, 1931 3 Claims.

This invention relates to improvements in devices for distributing air,for example ventilating devices, and is concerned with devices of the- Asensation of draught occurs in a room when air is introduced into theroom at a velocity which is too high to be comfortable. In the art ofventilation, therefore, efforts are made to annul the velocity of an aircurrent introduced into a room immediately at its place of inlet, or toreduce the velocity to such an extent as to avoid draughts;

This can be accomplished by means of ventilating devices of the type.with which the invention is concerned mounted in front of the air inletinto the room. Such ventilating devices divide the incoming air currentinto a number of separate currents, and have comprised partitions thelateral walls of which form with the axis of the device obtuse angles inthedirection of flow of the air current and which provide air passagesof gradually increasing cross-section outwardly. Other ventilatingdevices are known which deflect the air current in its fullcross-section in all directions. A device is also known whereby theincoming air current is divided, by means of perforated circular platesdisposed at right angles to the axis of that current, into separatecurrents which are situated in front of one another and are deflected atright angles to the said axis. Deflection at right angles to thedirection of flow of the incoming air current has the disadvantage ofconsiderably increasing the resistance and therefore of operatinguneconomically, due to the increased consumption of power.

The object of the present invention is to provide improvedair-distributing. devices of the aforesaid type.

With this object in view, the invention provides an air-distributingdevice of the type described wherein the partitions arelocated in frontof one another in the direction of the axis of the device, incontradistinction to the known devices of this type in which thepartitions he one within another.

The lateral walls of the partitions may be parallel to one another andform obtuse, angles with the axis of the device in the direction of flowof the air current, in which case these angles are equal to one another.

Alternatively, the lateral walls of the partitions (Cl. 98-40) J mayform with the axis of the device obtuse angles in the direction of flowof the air current, the magnitude of which angles increases from theinner to the outer end of the device so as to provide between each twopartitions an air passage of gradually increasing cross-section from itsinner to its outer end. By the inner end of the device is meant that endwhich is or can be connected to a pipe through which air enters thedevice. or leaves the device if it is used as an air outlet device.

Preferably the smaller, inner ends and also the larger, outer ends ofthe partitions progressively decrease in diameter from the inner to theouter end of the device.

Two embodiments of the invention suitable for ventilating purposes willnow be described,'as examples, with reference to the accompanyingdrawing, in which:-

Figure 1 is a diagrammatic section of one construction and Figure 2 is asimilar view of the other construction.

Like reference characters indicate like parts throughout.

The construction a pipe E and a number of truncated conical parshown inFigure 1 comprises titions a to f situated in front of one another withtheir smaller ends directed towards the pipe E but out of the plane ofthe adjacent end of the from the pipe E. The partition a is rigidlysecured to the pipe E, while the other partitions are connected to thepartition 'a and to one another by a plurality of retaining elements a.Retaining elements may also be employed at the inner edges of thepartitions if the size of the distributor renders that desirable. Thelateral walls of the partitions a to f are parallel to one another andthey form, with the axis h---h -'-h oi the device, obtuse angles a to awhich are equal to one another. The smaller, inner ends and also thelarger, outer ends of the partitions are 0! gradually decreasingdiameter from the partition 0 to the partition 1. It is not essentialfor the partitions a to f to be at the same distance from one another.

Assuming that air enters the device through the pipe E, it firstencounters the inner edge or the partition b and an annular portion ofthe air current is deflected obliquely downwards by the partition b. Theresidue of the incoming air current then meets the inner edge of thepartition c where another annular portion thereof is deflected and so onuntil only a small residue of the incom- Eli ing air current is leftwhich flows through the small opening in the inner end of thepartition 1. The separate annular currents which are thus deflectedobliquely downwards by the partitions a to f flow into the room allround the device. It will be appreciated that, due to the division ofthe incoming air current into separate currents and to the adhesion ofthose currents to the partitions, the velocity of the air entering theroom is so small that it is not felt as a draught, and also that, due tothe fact that the separate currents are deflected from the main incomingcurrent at an obtuse angle and not at right angles thereto, there isonly a slight increase in resistance.

In the construction shown in Figure 2, the distance between each pairlofpartitions is greater at their outer edges than at their inner edges.The angles 5 to 5 formed by the partitions and the axis hh h of thedevice increase as the distance of the partitions from the inlet pipe Eincreases, and as adjacent partitions diverge outwardly, the velocity ofthe separate currents flowing between them is reduced to a greaterextent than in the device according to Figure 1.

As in the case of the construction illustrated in Figure 1, the smaller,inner ends and also the larger, outer ends of the partitionsprogressively decrease in diameter towards the outer end of the device;i. e., from the partition a to the partition j. Because oftheprogressively decreasing diameter of the inner ends of the partitionssuccessive annular portions of the air or gas stream are deflectedoutwardly by the successive partitions as heretofore stated, whilebecause of the progressively decreasing diameters of the outerends ofthe partitions the air or gas is liberated at points progressivelycloser to the axis of the device toward its outer end and a wider andtherefore 'better distribution of the air or gas is obtained than wouldbe obtained if, for example, the partitions all were of thesame'diameter at their outer ends. Moreover, the velocity of the' air orgas decreases as it approaches the outer end ofthe device. If,therefore, the several partitions were of equal or substantially equalsize, the distribution of the. air or gas through the respectivepassageways-would not be uniform, assuming that-the device was otherwiseconstructed to effect discharge of approximately equal volumes of air orgas through the respec-- tive passageways. However, because ofprogressively decreasing the diameters of the larger ends of thepartitions toward the outer end of the device, their surface areas areprogressively decreased and consequently their frictional resistance toflow of the air or gas is progressively decreased, so that despite thedecrease in velocity of the air or' gas as it reaches the successivepartitions the volumetric distribution through the respectivepassageways is or may be substantially uniform. Again, because ofprogressively de creasing the diameters of the larger ends of thepartitions toward the outer end of the device, the device may beconstructed of much shorter length using any given number of partitionsthan would be possible if the partitions all were of equal diameterat'their larger, outer ends.

Preferably, a device according to Figure 1 will be usedwhen the velocityof the incoming air current is low, and a device according to Figure 2will be employed when that velocity is high.

The device shown in Figure 1 has the advantage that it can be moreeconomically manufactured than that shown in Figure 2 because all thepartitions are of the same inclination and can be made from the samepattern.

Both devices can also be employed for extracting air from a room, inwhich case the pipe E will be connected to the air outlet.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A device of the character described comprising a series of outwardlyflaring truncated hollow members open at their ends and disposed withtheir axes in substantially the same straight line and with theirsmaller ends all facing the inner end of the device, said members beingsuccessively spaced outwardly each entirely in front of the precedingmember, and the obtuse angles between the surfaces of the members andthe axis of the device progressively increasing toward the outer end ofthe device.

,2. A device of the character described comprising a series of outwardlyflaring truncated hollow members open at their ends and disposed withtheir axes in substantially the same straight line and with theirsmaller ends allfacing the inner end of the device, said members beingsuccessively spaced outwardly each entirely in front of the precedingmember, said members being of progressively decreasing diameters both attheir inner and their outer ends toward the outerend of the device, andthe obtuse angles between the surfaces of the members and the axis ofthe device progressively increasing toward the outer end of. the device.

3. A device of the character described comprising a series of outwardlyflaring truncated hollow members open at their ends and disposed withtheir axes in substantially the same straight line and with theirsmaller ends all facing the inlet end of the device, said members beingsuccessively spaced outwardly each entirely in front of the precedingmember, and the larger outer ends of said members progressivelydecreasing in diameter toward the outlet end of the device. C

JOST SASSENBERG-

